<!-- 填充模式 -->

<template>
  <div><u-collapse fill="content">
    <u-collapse-item title="面板1" expanded>Content1</u-collapse-item>
    <u-collapse-item title="面板2">Content2</u-collapse-item>
    <u-collapse-item title="面板3">Content3</u-collapse-item>
</u-collapse></div>
</template>